1. Rinse rice under water, drain and cook according to directions on package. Remove lid from pot and run a rice paddle around the edge to allow air to escape. After the steam settles, transfer the rice to a bowl and let cool. Douse rice with brown rice vinegar and 1 tablespoon mirin; mix gently with two forks or your hands. Be careful not to overmix or rice will become too mushy to handle.